KR20210088376A - Stepless door checker for vehicle - Google Patents

Abstract

The present invention relates to a stepless door checker for a vehicle. More specifically, the stepless door checker for a vehicle comprises: a checker arm rotatably formed on a vehicle to be arranged between a door and a vehicle body, and having a rack gear; a main housing having a first accommodation space formed therein to accommodate the checker arm; a conversion unit including a pinion embedded in the first accommodation space of the main housing to be engaged with the rack gear of the checker arm and a wheel gear connected to the pinion, and converting a straight-line motion of the checker arm into a rotary motion when opening and closing the door; a worm gear embedded in the main housing, and provided to idle to be engaged with the wheel gear of the conversion unit; and a cover covering the main housing. The maximum static friction acting between the worm gear and the wheel gear of the conversion unit acts as critical friction for resuming an operation while the door is stopped. The idling worm gear and the wheel gear for converting a straight-line motion of the checker arm into a rotary motion are engaged to stop the door at any position of the checker arm and open the door again by applying a prescribed force. The door can be stopped at any position by the static friction acting between the wheel gear and the worm gear. If a force exceeding the static friction is applied, the door can be opened and closed with a small force by kinetic friction.

Description

Stepless door checker for vehicle

The present invention stops the door at any position of the checker arm, and a wheel gear for converting the linear motion of the checker arm into a rotational motion so that the door can be opened and closed again by applying a certain force. At this time, the wheel gear and the worm gear are engaged. It relates to an endless door checker for vehicles that can stop the door at any position by the static friction force acting between the and the worm gear, and can open and close the door with little force by the kinetic friction force when a force exceeding the static friction force is applied. .

In the case of a general checker arm, a plurality of irregularities are formed on a rod of a certain length, and when the door is opened or closed at a certain angle by the irregularities, the irregularities serve to hold the irregularities from being opened any more.

According to this prior art, in a vehicle door checker device installed between a vehicle body and a door, the door checker device includes: a checker arm having one end connected to the vehicle body and the other end connected to the door; a slider movably provided on the checker arm; an elastic member elastically supporting the slider; and a checker case accommodating the slider and the elastic member, and provided to be movable with respect to the checker arm, wherein the checker case is injection-molded with a plastic material.

According to this prior art, it is possible to implement an optimized operating force of opening and closing when a door of a vehicle is opened and closed.

However, in the case of the prior art, the checker arm also has a disadvantage in that the position for stopping the door is determined by the unevenness formed on the checker arm, so that the door cannot be stopped at other positions.

Therefore, in order to solve this disadvantage, the present invention proposes a stepless door checker, that is, a door checker that can stop the door at any position of the checker arm without determining the position to stop the door like the irregularities of the conventional checker arm. want to

Republic of Korea Patent Publication No. 10-2019-0004960 (published on January 15, 2019)

The present invention has been devised to solve the problems as described above,

To stop the door at any position of the checker arm and apply a certain force to open and close the door again, the wheel gear for converting the linear motion of the checker arm into rotational motion meshes with the worm gear, which rotates at idle, between the wheel gear and the worm gear The purpose of providing an endless door checker for vehicles that can stop the door at any position by the static friction force acting on it, and that can open and close the door with little force by the kinetic friction force when a force exceeding the static friction force is applied do.

The stepless door checker for a vehicle according to the present invention includes: a checker arm formed to be rotatable in a vehicle and disposed between a door and a vehicle body, and having a rack gear; a main housing having a first accommodating space formed therein to accommodate the checker arm; It consists of a pinion built in the first accommodating space of the main housing and meshing with the rack gear of the checker arm, and a wheel gear connected to the pinion. When the door is opened and closed, the linear motion of the checker arm is converted into a rotational motion. a conversion unit for converting; a worm gear built into the main housing and provided to be idling and meshed with the wheel gear of the conversion unit; and a cover covering the main housing, wherein the maximum static frictional force acting between the wheel gear of the conversion unit and the worm gear acts as a critical frictional force for resuming the operation in the stationary state of the door.

The frictional force acting between the wheel gear and the worm gear of the conversion unit according to the present invention is characterized in that it is set by a lead angle or a gear ratio between the wheel gear and the worm gear.

The main housing according to the present invention is formed on one side and includes a through hole for drawing in and withdrawing the checker arm, a first fixed shaft formed on the inner wall surface of the first receiving space and axially coupled to the conversion unit, It is formed on the inner wall surface of the first accommodating space, is disposed to be perpendicular to the upper portion of the first fixed shaft, and characterized in that it comprises a second fixed shaft to which the worm gear is shaft-coupled.

In the main housing according to the present invention, a first housing extending to the other side is formed, and the first housing is connected to a lower space of the first accommodation space and is provided with a second accommodation space for accommodating the checker arm. do it with

A second housing having a third accommodating space in which a driving motor is embedded is provided on the upper portion of the other side of the housing according to the present invention, and the third accommodating space is communicated with an upper space of the first accommodating space to form a drive shaft of the driving motor And the worm gear and the shaft-coupled second rotation shaft is characterized in that it is connected.

A partition is formed between the first housing and the second housing according to the present invention, and a plurality of reinforcing ribs are formed in the partition.

The stepless door checker for a vehicle according to the present invention stops the door at any position of the checker arm, and a wheel gear for converting the linear motion of the checker arm into rotational motion so that the door can be opened and closed again by applying a certain force and a worm gear rotating at idle At this time, the door can be stopped at any position by the static friction force acting between the wheel gear and the worm gear, and when a force exceeding the static friction force is applied, the door can be opened and closed with a small force by the kinetic friction force. .

In addition, in the present invention, the friction force between the wheel gear and the worm gear can be adjusted and controlled through the lead angle and the control ratio, and the overall configuration of the door checker for implementing this is simplified, making it easy to manufacture and reduce the production cost. have.

1 is an exploded perspective view showing an stepless door checker for a vehicle according to the present invention;
2 is an operation diagram showing the operating state of the vehicle stepless door checker according to the present invention;
3 is an exploded perspective view showing another embodiment of an endless door checker for a vehicle according to the present invention;
Figure 4 is an operation diagram showing the operating state of the vehicle stepless door checker according to the embodiment of Figure 3;
5 is a use state diagram showing that the stepless door checker for a vehicle according to the embodiment of FIG. 3 is installed in a vehicle;
6 and 7 are graphs showing the operating force of the door according to the lead angle and the friction coefficient of the stepless door checker for a vehicle according to the present invention.

In order to explain the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, preferred embodiments of the present invention will be exemplified below and will be described with reference thereto.

First, the terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention, and the singular expression may include a plural expression unless the context clearly indicates otherwise. Also in the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other It is to be understood that this does not preclude the possibility of addition or presence of features or numbers, steps, operations, components, parts, or combinations thereof.

In describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 to 5, the stepless door checker (DC) for a vehicle according to the present invention includes a checker arm 10 connected to a vehicle body C, a main housing 20 in which the checker arm 10 is accommodated, and , a conversion unit 30 composed of a pineer and a wheel gear 33 embedded in the main housing 20 , and a worm gear 40 embedded in the main housing 20 and meshed with the wheel gear 33 of the conversion unit 30 . ) and a cover 50 covering the main housing 20 .

First, the door checker DC according to the present invention is connected to the door D as shown in FIG. 5 . In this case, a hole-shaped fixing part 23 is formed on one side of the main housing 20 to form the door D ) and bolted together. Also, at one end of the checker arm 10, a coupling part 13 connected to the coupling hole 1 provided in the vehicle body C is formed, and the coupling part 1 of the vehicle body C and the coupling part of the checker arm ( 13) is hinge-coupled so that when the door D is opened and closed, the checker arm 10 can be rotated as the checker arm 10 is drawn in and out along the rotation direction of the door D.

1 and 2, the checker arm 10 according to the present invention has a rod shape having a constant length, and a rack gear 11 is formed at the upper portion, and a coupling hole (C) of the vehicle body C is formed at one end. 1) is formed with a coupling portion 13 that is hinged.

In this case, the checker arm 10 is built into the first accommodating space 21 of the main housing 20 , and is configured to be drawn out or retracted from the first accommodating space 21 when the door is opened and closed. That is, when the door is opened, since the door is opened while rotating in the outward direction, the checker arm 10 is drawn out from the first accommodating space 21 of the main housing 20 while turning in the outward direction based on the coupling port of the vehicle body. In addition, when the door is closed on the contrary, the door D is closed while rotating in the inward direction, so the checker arm 10 rotates in the inward direction based on the coupling port of the vehicle body and the first accommodation space 21 of the main housing 20. is introduced into

As shown in FIGS. 1 and 2 , the main housing 20 according to the present invention is configured to be mounted on a door, and a conversion unit 30 and a worm gear 40 to be described later in the first accommodating space 21 therein. In addition to being built-in, the checker arm 10 is accommodated to enable withdrawing and retracting operations.

As described above, the main housing 20 has a first accommodating space 21 formed in its inner space, and a checker arm 10 is penetrated and coupled to one side of the through-hole ( 29) is formed. In addition, a fixing part 23 in the form of a hole for mounting the main housing 20 to the door is formed on one side of the main housing 20, and the fixing part 23 and the door are fastened with bolts to the main housing 20 It can be mounted on the door (D).

In this case, the first accommodating space 21 of the main housing 20 can be roughly divided into an upper space and a lower space. The upper space is a space for accommodating the converter 30 and the worm gear 40, and the lower space is It is a space for accommodating the checker arm (10).

A first fixed shaft 25 mounted on the inner surface of the lower side in the upper space of the first accommodating space 21 to which the conversion part 30, that is, the pinion 31 and the wheel gear 33 are shaft-coupled, and the first A second fixed shaft 27 mounted on the inner surface of the upper side in the upper space of the accommodating space 21 and disposed perpendicular to the first fixed shaft 25 to which the worm gear 40 is shaft-coupled is provided.

Also, the checker arm 10 is accommodated in the lower space of the first accommodating space 21 . In this case, when the checker arm 10 is drawn into the first accommodating space 21 , the checker arm 10 is exposed to the outside. The first housing 60 is installed to extend under the other side of the main housing 20 so as to prevent the checker arm 10 from being drawn into the interior of the first accommodating space 21 . In this case, of course, a second accommodating space 61 for accommodating the checker arm 10 is formed inside the first housing 60 .

In addition, the main housing 20 is covered by the cover 50 so that its inner space is blocked from the outside.

1 and 2, the converter 30 according to the present invention is configured to convert the linear motion of the checker arm 10 into a rotational motion when the door is opened and closed.

To this end, the conversion unit 30 is accommodated in the first accommodating space 21 of the main housing 20 , the pinion 31 meshed with the rack gear 11 of the checker arm 10 , and the pinion 31 . It is composed of a wheel gear 33 that is connected. That is, the conversion unit 30 has a pinion 31 disposed on the front side, a wheel gear 33 disposed on the rear side, based on the illustration of FIG. 1 , and the wheel gear 33 has a diameter greater than that of the pinion 31 . formed large.

Therefore, when the checker arm 10 opens and closes the door, it moves in a straight line while being drawn out and retracted. At this time, the pinion 31 of the conversion unit 30 meshed with the rack gear 11 of the checker arm 10 rotates to rotate the checker arm 10 . The linear motion of the arm 10 is converted into a rotational motion. In this case, the wheel gear 33 also rotates in the same direction as the pinion 31 .

As shown in FIGS. 1 and 2 , the worm gear 40 according to the present invention is meshed with the wheel gear 33 of the conversion unit 30 to enable idle rotation.

The worm gear 40 for this purpose is accommodated in the first accommodating space 21 of the main housing 20 and is shaft-coupled to the second fixed shaft 27 to enable idle rotation. At this time, the worm gear 40 is meshed with the wheel gear 33 of the conversion unit 30 . In this case, the first fixed shaft 25 on which the converter 30 is mounted and the second fixed shaft 27 on which the worm gear 40 is mounted are disposed in a shape perpendicular to each other, so that the rotation direction of the converter 30 is It rotates in a horizontal direction on the ground of the accompanying drawings, and the rotation direction of the worm gear 40 rotates in a vertical direction with respect to the ground of the accompanying drawings.

The stepless door checker for a vehicle according to the present invention configured as described above includes a checker arm 10 that moves linearly when the door is opened and closed, and a pinion of the conversion unit 30 that meshes with the rack gear 11 of the checker arm 10 . By (31), the linear motion of the checker arm 10 is converted into a rotational motion. In particular, the wheel gear 33 and the worm gear 40 of the converter 30 enable control of the force acting on the door by frictional force when the door D is opened and closed.

In the case of a conventional checker arm, a plurality of irregularities are formed on a rod of a certain length, and when the door is opened or closed at a certain angle due to the irregularities, the irregularities serve to hold the irregularities so that they are no longer opened.

In the case of such a conventional checker arm, the position for stopping the door is determined by the unevenness formed on the checker arm, so there is a disadvantage that the door cannot be stopped at other positions.

Therefore, in the present invention, in order to solve this disadvantage, the position for stopping the door is not determined by the stepless door checker (DC), that is, as in the irregularities of the conventional checker arm, and the door is stopped at any position of the checker arm 10 . We would like to propose a door checker (DC) that can

In particular, in order to realize this, a rack gear 11 is formed in the checker arm 10 according to the present invention, and the pinion 31 of the converter 30 is meshed with the rack gear 11 to convert a linear motion into a rotational motion. will be converted to At this time, the wheel gear 33 and the worm gear 40 of the conversion unit 30 are meshed with each other, and friction occurs between the teeth of each gear meshed with each other between the wheel gear 33 and the worm gear 40. do. In this case, the external force acting on the checker arm 10 up to the maximum static friction force acting between the wheel gear 33 and the worm gear 40, that is, the force to operate the door increases, and when it exceeds the maximum static friction force, it is reduced by the kinetic friction force. The door can also be operated by force.

That is, the maximum static friction force between the wheel gear 33 and the worm gear 40 acts as a critical friction force in order to resume operation in the open or closed state of the door, that is, the stationary state of the door.

In this case, when the door checker according to the present invention opens and closes the door by the checker arm 10, the conversion unit 30 and the worm gear 40, unlike the conventional checker arm 10, it is possible to stop the door at any position will do That is, if the user removes the force while opening or closing the door, the door may stop immediately with the force removed. This is different from the conventional checker arm 10 stopping only at the uneven portion thereof.

In addition, the door can be maintained in a stopped state by holding the door by the force of the maximum static friction force between the wheel gear 33 and the worm gear 40 . In this case, when the user applies a force to overcome the maximum static friction force between the wheel gear 33 and the worm gear 40 to resume the operation of the door, after the operation of the door is resumed by the kinetic friction force, the door is operated with a small force. operation is also possible.

In this case, the frictional force between the wheel gear 33 and the worm gear 40 can be controlled by the lead angle or gear ratio of each gear. That is, the frictional force according to the lead angle of the wheel gear 33 and the worm gear 40 is inversely proportional to each other, and as the lead angle decreases, the frictional force also increases. In this way, the increase in frictional force according to the lead angle increases the frictional force if the material and contact conditions of the wheel gear 33 and the worm gear 40 are the same, and in this case, the maximum static frictional force also increases. Therefore, when the lead angles of the wheel gear 33 and the worm gear 40 are made small, a larger force must be applied to the door in the stationary state of the door to resume the operation. This means that the checker arm 10 exerts a greater force on the door to keep the door stationary.

6 and 7, the lead angle of the worm gear is selected in the range of 11.6° to 11.9°, in this case, the static friction coefficient is 0.17, and the kinetic friction coefficient can be selected as 0.15. That is, when the lead angle of the worm gear indicated by the dotted line in FIG. 6 is 11.6° or less, the operating force of the door shows an excessively large difference between static friction and kinetic friction, so that a too large force is applied to restart the door operation. There is a problem that must be done. In addition, when the lead angle of the worm gear indicated by the dotted line in FIG. 6 exceeds 11.9°, the difference in the operating force of the door between the static friction and the kinetic friction is too small, so that the door moves too easily to start the operation again. In addition to this, a problem in that the door operates even when a very small external force is applied may occur.

Therefore, it is preferable to select the lead angle of the worm gear in the range of 11.6° to 11.9° as described above, and correspondingly, the static friction coefficient is 0.17 and the kinetic friction coefficient is 0.15.

In addition, the frictional force between the wheel gear 33 and the worm gear 40 can be controlled by the gear ratio. In this case, the larger the gear ratio between the wheel gear 33 and the worm gear 40, the greater the difference between the wheel gear 33 and the worm gear 40. The friction force will increase. Therefore, in the case of controlling the friction force through the gear ratio between the wheel gear 33 and the worm gear 40, if the gear ratio is increased, a greater force must be applied to the door to resume the operation of the door, which means that the checker arm 10 stops the door. It means that a greater force is acting on the door (D) to maintain it.

As for the door checker as described above, FIGS. 1 and 2 relate to a manual type in which the user manually opens and closes the door D, and FIGS. 3 and 4 are the manual type door checkers of FIGS. 1 and 2 ( It is a door checker related to the power specification in which the driving motor 80 is applied to the worm gear 40 in DC).

To explain this in more detail, as shown in FIGS. 3 and 4 in the manual type door checker of FIGS. 1 and 2 , the third accommodating space in which the driving motor 80 can be built in the other upper side of the main housing 20 . A second housing 70 having a 71 is further provided.

In this case, the worm gear 40 is connected to the drive shaft 81 of the drive motor 80, and the door checker DC of the power specification according to FIGS. 3 and 4 is different from the manual type door checker of FIGS. 1 and 2 . According to the signal for opening and closing the door (D), the driving motor (80) is operated to withdraw the checker arm (10) from the first accommodating space (21) of the main housing (20) and insert the door (D). can be opened and closed.

Meanwhile, in FIGS. 3 and 4 , the second housing 70 is integrally formed with the main housing 20 in order to implement the power-spec door checker, but, in contrast, the second housing in which the driving motor 80 is built-in. It is also possible that the 70 is installed so as to be detachably attached to the other side of the main housing (20). This has the advantage of allowing the manual type or power specification door checker to be selectively used according to the user's choice. In this case, when the second housing 70 is detachably attached, the driving shaft 81 of the driving motor 80 may be formed to be connected to and separated from the second fixed shaft 27 . In this case, the second fixed shaft 27 ) and the worm gear 40 are integrally formed, and the second fixed shaft 27 may be configured to be rotatable. Alternatively, when the second housing 70 is detachably attached, the drive shaft 81 of the drive motor 80 may be installed to be shaft-coupled to the worm gear 40 .

The accompanying diagram of FIG. 5 shows a state in which the door checker DC of the power specification of FIGS. 3 and 4 is operated, and FIG. 5 (a) is a case in which the door (D) is closed, and FIG. 5 (b) ) indicates a state in which the door D is opened. The illustration of FIG. 5 can be applied as it is to the case of the manual type door checker DC of FIGS. 1 and 2 . That is, it can be applied with the second housing 70 and the driving motor 80 removed as shown in FIG. 5 .

Meanwhile, as shown in FIGS. 3 and 4 , a partition part 90 is provided between the first housing 60 and the second housing 70 to physically partition the first housing 60 and the second housing 70 . can do. In this case, a plurality of reinforcing ribs 91 may be formed on the upper portion of the partition 90 . This may cause a load due to the behavior of the checker arm 10 drawn out and retracted from the second receiving space 61 of the first housing 60 under the reinforcing rib 91, and at the same time, the reinforcing rib 91 upper A load due to vibration or vibration may be generated by the driving motor 80 provided on the third accommodation space 71 of the second housing 70 . Therefore, the reinforcing rib 91 is disposed between the first housing 60 and the second housing 70 to enhance the durability by reinforcing the rigidity of the housing from the load by the checker arm 10 and the driving motor 80 . do.

However, as shown in FIGS. 1 and 2 , in the case of a manual type door checker, only the first housing 60 may be provided, and in this case, the reinforcing rib 91 is a load generated from the behavior of the checker arm 10 . It is also possible to increase the durability by reinforcing the rigidity of the first housing 60 from the .

As described above, the present invention has been described with reference to one embodiment shown in the drawings, but this is merely exemplary, and various modifications and equivalent other embodiments are possible therefrom by those of ordinary skill in the art. will understand

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

DC : door checker
C : Body D : Door
1: coupler
10: checker arm
11: rack gear 13: coupling part
20: main housing
21: first accommodation space 23: fixed part
25: first fixed shaft 27: second fixed shaft
29: through hole
30: conversion unit
31: pinion 33: wheel gear
40: worm gear
50 : cover
60: first housing
61: second accommodation space
70: second housing
71: third accommodation space
80: drive motor
81: drive shaft
90: compartment
91: reinforcement rib

Claims (6)

a checker arm (10) formed to be rotatable in a vehicle, disposed between the door (D) and the vehicle body (C), and having a rack gear (11);
a main housing 20 having a first accommodating space 21 formed therein to accommodate the checker arm 10;
A pinion 31 built in the first accommodating space 21 of the main housing 20 and meshed with the rack gear 11 of the checker arm 10, and a wheel gear 33 connected to the pinion 31 ) is composed of
a conversion unit 30 for converting the linear motion of the checker arm 10 into a rotational motion when the door (D) is opened and closed;
a worm gear 40 embedded in the main housing 20 and provided to be idling and meshed with the wheel gear 33 of the conversion unit 30; and
Doedoe including; a cover 50 covering the main housing 20;
The maximum static frictional force acting between the wheel gear 33 of the conversion unit 30 and the worm gear 40 acts as a critical frictional force for resuming operation in the stationary state of the door (D). door checker.
The method of claim 1,
The frictional force acting between the wheel gear 33 of the conversion unit 30 and the worm gear 40 is set by a lead angle or a gear ratio between the wheel gear 33 and the worm gear 40 Unauthorized door checker.
According to claim 1, wherein the main housing (20)
a through hole 29 formed on one side and for drawing in and withdrawing the checker arm 10;
a first fixed shaft 25 formed on the inner wall surface of the first accommodation space 21 and axially coupled to the conversion part 30;
It is formed on the inner wall surface of the first accommodating space 21, is disposed to be orthogonal to the upper portion of the first fixed shaft 25, and includes a second fixed shaft 27 to which the worm gear 40 is shaft-coupled. Stepless door checker for vehicles featuring.
The method of claim 1,
The main housing 20 is formed with a first housing 60 extending to the other side,
The first housing (60) is connected to the lower space of the first accommodating space (21), and a second accommodating space (61) for accommodating the checker arm (10) is provided.
5. The method of claim 4,
A second housing 70 having a third accommodating space 71 in which the driving motor 80 is built is provided on the other upper portion of the main housing 20,
The third accommodating space 71 communicates with the upper space of the first accommodating space 21 so that the worm gear 40 and the drive shaft 81 of the driving motor 80 are coupled to each other. checkers.
6. The method of claim 5,
A partition 90 is formed between the first housing 60 and the second housing 70,
Stepless door checker for a vehicle, characterized in that a plurality of reinforcing ribs (91) are formed in the partition (90).

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